Exercise: Electronic Principles

Questions for: Electronic Principles

What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm?
A:
60 Ohm
B:
99.3 Ohm
C:
250 Ohm
D:
70.7Ohm
Answer: D
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Which one of the following is a statement of KirchhofFs voltage law?
A:
The total voltage in a parallel circuit is less than the value of the smallest voltage
B:
The algebraic sum of voltages in a loop is equal to zero
C:
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
D:
The algebraic sum of voltages entering and leaving a point is equal to zero
Answer: B
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What is the inductive reactance of a 0.1-H coil that is operating at 1000 Hz?
A:
100 Ohm
B:
Less than 1 Ohm
C:
628 Ohm
D:
444 Ohm
Answer: C
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What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding?
A:
1/4
B:
1/3
C:
2
D:
3
Answer: D
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If a transistor operates at the middle of the load line, an increase in the current gain will move the Q point
A:
down
B:
up
C:
nowhere
D:
off the load line
Answer: B
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